Windows Update fails because TrustedInstaller fails to start due to bad road cbscore.dll

I get error 80080005 when you try to run windows update.  I followed this to the fact that the Windows Module Installer fails to start.  Using ProcMon I could find this TrustedInstaller.exe fails to start.  It is a failure due to the following:

TrustedInstaller.exe QueryOpen C:\Windows\servicing\\cbscore.dll IO QUICK REJECTED
TrustedInstaller.exe CreateFile C:\Windows\servicing\\cbscore.dll path ACCESS not FOUND
TrustedInstaller.exe QueryOpen C:\Windows\servicing\\cbscore.dll IO QUICK REJECTED
TrustedInstaller.exe CreateFile C:\Windows\servicing\\cbscore.dll path ACCESS not FOUND

I searched and cbscore.dll is actually under:


I tried to understand where TrustedInstaller.exe gets the path for cbscore.dll, but I had no chance.  Can someone tell me where TrustedInstaller.exe gets this way?  Or, more generally, how can I solve this problem?

Thank you!

The McAfee free trial (which is preinstalled on the computer when you bought it) expires before you've bought & installed McAfee Security Center?

Installed Updates lists the the system update tool... (KB947821)?

I'm afraid things only left in my neck are (1) performs a thorough check of malware, (2) do a repair installation of Vista or (3) formatting the HARD drive & doing a new installation of Vista. ~ Robear Dyer (PA Bear) ~ MS MVP (that is to say, mail, security, Windows & Update Services) since 2002 ~ WARNING: MS MVPs represent or work for Microsoft

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